I have a Common Kingsnake I've recently moved from a 20 gallon glass tank to a 50 gallon Sterilite tub. She's growing rapidly, so, the move was warranted. I use Kraft indented paper as a substrate, and it has worked well.

One problem with the tub is the rounded shape, and the raised bottom with the recessed perimeter...this naturally makes fitting sheets of paper trickier and less flush then in a rectangular tank (with the flat bottom, and 90 degree corners).

The snake has recently taken to burrowing under the paper. Doesn't matter how many layers I put in, she goes right for the bottom, flush with the plastic.

Should I worry about this? She gets time out of the tub to defecate (which is regularly predictable), and she's pretty good about it, believe it or not. I've got humidity dialed in, now at about 62%, and there's no condensation. One concern is the UTH (on a thermostat). Above the paper, the temp reads about 84 degrees, and 89 degrees below it at the plastic. I have a heavy hide covering the UTH, so it would be difficult for her to get directly over it unless she's in the hide itself, on the paper. She's been close underneath, but smartly off of it. Should I worry about the snake's belly contacting the plastic, all things being equal? Thanks/any thoughts welcome...